let store = Symbol('_store_')
let Cache = {
	get(key) {
		return this[store].get(key)
	},
	put(key, val) {
		this[store].set(key, val)
	},
	has(key) {
		return this[store].has(key)
	},
	delete(key) {
		this[store].delete(key)
	}
}
Cache[store] = new Map()


module.exports = Cache